T-Rex: You know how you know your childhood is TRULY over?
Off panel: Is it when your dreams die, T-Rex?
T-Rex: Dromiceiomimus! It is NOT!

T-Rex: Let me come closer to explain further!
Off panel: Okay

T-Rex: It's when your NIGHTMARES become fully unrelatable to anyone NOT an adult.
Dromiceiomimus: You know what? That's fair!
T-Rex: I had a nightmare last night where I owned a house, and I found a room I'd never been in, and THE ROOF WAS LEAKING THERE with water damage was so catastrophic that I woke up!!

Utahraptor: Oh god, had the water gotten to the foundation and damaged it too?
T-Rex: See? SEE?!

T-Rex: There is not a child on Earth who is like "oi, last night I dreamed of expensive water damage."
Utahraptor: In this hypothetical, the child is British?
T-Rex: Obviously!!

T-Rex: It's time to admit it: I am no longer a cool teen, and am, at best, a cool FORMER teen.
Off panel: "Cool former teen" is definitely something someone very old would say while trying to pass as young.
T-Rex: I know!
T-Rex: THAT'S WHY I SAID IT!!